Nonallium

Nonallium is a fictional chemical element introduced in speculative science and science fiction as a hypothetical, superheavy nonmetallic element. It is not recognized by IUPAC, and no experimental data support its existence in the real world. The term is used as a thought experiment about extending the periodic table beyond known elements.

Named as a neologism used in fiction, it is sometimes given symbols such as Nl or NaL, varying by author. Because it is not a real element, there is no canonical naming convention, and descriptions of its properties differ across works.

Proposed properties vary by author. In various narratives, Nonallium is described as extremely dense, with high mechanical strength, low reactivity with air, and unusual electronic properties such as potential superconductivity at accessible temperatures or the tendency to form weak bonds with hydrogen.

Synthesis and occurrence: In fiction, production would require breakthroughs in high-energy physics or novel fusion processes, with hypothetical isotopic forms concentrated in laboratory settings. It is typically portrayed as unstable under normal conditions, detectable only under extreme pressures or in exotic quantum states.

Applications and cultural role: In fiction, Nonallium serves as a plot device for advanced technology, energy storage, or exotic materials; in theoretical discussions, it is used to explore the limits of the periodic table and bonding theory.

See also Allium, Superheavy elements, Hypothetical element.